SEA92LA181

NTSB accident investigation · R.P. Williams Acro Sport II · Herriman, UT · August 17, 1992

Accident · FatalLimited investigationFinal report
Date
August 16, 1992, 19:30 local (Aug 17, 1992, 01:30 UTC)
Place
Herriman, UT
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N122RWR.P. Williams Acro Sport II
Weather
Visual (VMC) · Day
Status
Completed · report August 31, 1993
Report
Approved by Office Director
FAA report
19920816031319A
Case key
42878

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

Inadequate remedial action and poor inflight planning/decision. A factor to the accident was: an uncontrolled stall/spin.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightManeuvering
Stall/spin - encounteredPilot in commandFactor
Remedial action - inadequatePilot in commandCause
In-flight planning/decision - poorPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - loose gravel/sandy

Analysis

Witnesses reported that they observed the homebuilt airplane performing aerobatic maneuvers in the area for approximately 15 minutes before the accident. The airplane was at approximately 500 feet AGL when it entered a spin. The airplane did not recover before colliding with the terrain in a nose down attitude.

Aircraft

Registration
N122RW
Reported as
R.P. Williams Acro Sport II (ACRO SPORT)
Category
Airplane, amateur-built
Serial number
1074
Airframe hours
19
Engine
Lycoming IO-360, 200 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Williams, Robert & Rand
Registered owner
Williams, Robert & Rand
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Unknown · May 12, 1992 · 19 hours before
Departed
U42 · Salt Lake City, UT

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Toxicology
Performed
Flight hours
13,875 total · 15 in this make and model · 11,574 as pilot in command · 15 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 11 knots
Visibility
30 statute miles
Lowest ceiling
25,000 ft broken
Temperature
84 °F, dew point 50 °F
Altimeter
30.00 inHg
Observed at
SLC, 6 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.